Skip to main content Accessibility help

Genotype by environment interaction for milk, fat and protein yield in Holstein Friesian dairy cattle in Ireland

  • A. R Cromie (a1) (a2), D.L Kelleher (a1), F.J Gordon (a2) and M. Rath (a1)


The existence of genotype by environment interaction (G*E) can cause a change in the ranking of bulls tested in one environment when their daughters are subsequently milked in another environment. If the degree of re-ranking is large, the genetic correlation between milk production in the two environments will be substantially less than 1.0, with the implication that proofs made in one environment may not be reliable predictors of proofs in the second environment. The aim of this study was to investigate the effect of increasing the difference between environments, defined on the basis of herd average milk yield, on the genetic correlation (rg) for milk, fat and protein yield in Holstein Friesian dairy cattle in Ireland.



Hide All
Groeneveld, E., Kovac, M. and Wang, T. (1996) VCE REML version 3.2. User's manual.
Robertson, A. (1959). The sampling variance of the genetic correlation coefficient. Biometrics 15: 469485.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed